Paving plate



C. SCHENCK PAVING PLATE April 4, 1939.

Filed oct. 9, 1936 2 sheets-sheet 1 April 4, 1939. c. scHr-:NCK2,153,347

PAVING PLATE Filed oct.k 9, 1956 2 sheets-sheet 2 Patented Apr. 4, 1939UNITED STATES PATENT aOFFICE Pennsylvania Application October 9,

2 Claims.

This invention relates to improvements in metallic paving plates forbridges, tunnels and roadways and. to metallic floor plates forfactories, storage plants and the like.

Although concrete is recognized as la strong and durable material forroadways and floors, there are many environments in which a concretesurface is incapable of withstanding the destructive forces imposed uponit. A surface which is under constant and unusually severe traffic, orwhich is subjected continuously to the impact of sharp and heavy bodies,must be protected by a material which is much tougher than concrete inorder to prevent its. disintegration.

In the oors of narrow highway bridges and. vehicular tunnels, the steadystream of trac, confined to definite lanes of travel, slowly wears downconcrete. Stoppage of trafiic for road repairs results in a tremendousinconvenience to the public. Also, there are many places along heavilytravelled main highways, such as sharp curves .at the foot of steepinclines., where not only does the road surface need protection, butalso additional traction should be provided.

Again, in breweries for instance, the constant rolling on edge of heavy,steel-hooped barrels, cuts deeply into an ordinary cement finish. Handand electric trucks with small, narrow steel wheels, such .as are usedto transfer heavy loads along docks and platforms, in freight stationsand warehouses; break through a cement surface and soon develop cracks,holes and cuts. In manufacturing and storage plants, the damage tounprotected concrete floors resulting from the continual moving about oflarge heavy pieces of machinery and the like is. well known.

It is an object of this invention to provide a metal paving or floorplate adapted to resist and to endure under the wear imposed upon it bycontinuous and hard usage.

It is a further object of this invention to provide a metal paving platethat will afford. considerable traction to the tires of wheels passingover its surface, thus reducing the tendency of such vehicles to skid ona metal surface.

It is a still further object of this invention to provide a metal pavingplate which will form a permanently strong bond with the underlyingconcrete bed, so as to resist forces tending todislodge the plate fromthe position in which it is originally laid.

The novel features of my invention will be more fully understood fromthe following description and claims taken with the drawings, in which1936, Serial No. 104,747

Fig. 1 is a view in perspective of my paving plate shown embedded inconcrete.

Fig. 2 is a view in section along the line 2-2 of Fig. l.

Fig. 3 is a view in perspective of my floor plate, also shown embeddedin concrete.

Fig. 4 is a view in section along the line 4-4 of Fig'. 3.

Fig. 5 is a plan view of a section of a pavement structure embodying oneform of my novel paving plate. Y

Fig. 6 is a view in section along the line 6 6 of Fig. 5.

Referring now to Figs. 1 and 2, plate I 0 has depending flanges I Iwhich are crimped to form corrugations I2. The outwardly arched portionsI3 are at right angles to the tread surface of plate I and the innermostportions I 3' are at an acute angle to the tread surface and thecorrugations terminate short of the edge of the tread surface so thatthe plates may be assembled with the edges of the plates adjacent thetread portion in engagement with each other as plainly shown in Fig. 6.Plate I0 is shown set in a base of concrete I4. Welded in holes I in thesurface of plate I0 and embedded in concrete I4 are button-head anchorboltsy I6, which may be rough threaded or notched as shown at I1 in Fig.2. Also welded in holes I8 in the surface o f plate I0 are button-headrivets I9 which extend only a very short distance into the concretebase. The heads of anchor bolts I6 and rivets I9 serve to affordtraction toI the wheels of vehicles passing over the plate, .and toprevent their skidding thereon. The surface of plate Ill is alsoprovided with a plurality of slots 20 through which concrete I4 exudes.

Referring now to Figs. 3 and 4, there is shown therein floor plate 30intended for use on interior ooring surfaces. Plate 30 also hasdepending flanges 3| which are crimped to form corrugations 32. Theoutwardly arched portions 33 .are at right angles to the surface ofplate 30, and the innermost portions 33 are at an acute angle to thetread surface and the corrugations terminate short of the edge of thetread surface so that the plates may be assembled with the edges of theplates adjacent the tread portion in engagement with each other, in amanner similary to that shown in Fig. 6. Plate 30 is shown set in a baseof concrete 34. The surface of plate 30- is provided with a plurality ofcountersunk holes 35. Welded therein and embedded in concrete 34 are athead anchor bolts 36, which may be rough threaded or .notched as shownat 31 in Fig. 4.

The heads of bolts 36 are substantially ush with the surface of plate30. The surface of plate 30 is also provided with a plurality of slots38 through which concrete 34 exudes as it also does through bolt holes39 which, in this modication, are not required to be used.

It will be noted that plates I0 and 3l) are in all respects identicalexcept for the countersinking of holes 35 in plate 30. Plates Ill and 30are preferably formed from ordinary low carbon rolled steel plates,while anchor bolts I6 and rivets I9 arepreferably made of high carbon,Wear resisting steel. Anchor bolts I6 and rivets I 9 are so located inplate I0 that they tend to grip the tires of vehicles passing over theplate,

thus reducing the possibility of skidding and at the same time providingadditional traction. The number ofanchor bolts I6 used may varyaccording to conditions, but it is believed advisable to use a minimumof from nine to twelve such anchor bolts in a plate having a surfacedimension of twelve by eighteen inches. As has been stated before, theseanchor bolts being embedded in the concrete serve to hold the platefirmly in position. Additional bond is provided by the corrugatedflanges II, the corrugations I2 gripping the concrete securely andpreventing displacement of the plate upwardly or laterally. Furthermore,the concrete I4 which exudes through slots 20 and hardens therein alsoserves to hold plate I0 more securely in place and at the same timeincreases the ability of the surface of the plate to prevent skidding.

Floor plate 30, as has been said, is substantially identical with pavingplate I Il, and is intended for use inside of buildings. There are noprojections on its surface, the heads of anchor bolts 36 being sunk inholes 35 so as to be'substantially flush with the surface of the plate.In this modification also, the concrete 34 exuding through slots 38 andholes 39 serves to hold the plate more securely in place and at the sametime imparts to the surface of the plate an antiskid quality.

Although I have described and illustrated my invention in considerabledetail, I do not wish to be limited to the exact and speciiic detailsthereof, as shown and described, as it will be obvious that numerousvariations thereof might be constructed without departing from the scopeand spirit of my invention.

Having thus described my invention what I y claim and desire to secureby Letters Patent is:

1. A metallic surface plate having a depending corrugated ange on eachside thereof the outermost portions of the corrugations lying within aplane substantially at a right angle to said tread portion and theinnermost portions of the corrugations being at an acute'angle to thetread portion, and having a plurality of grooved anchor bolts extendingdownwardly through said plate and welded thereinto.V

2. A metallic paving plate comprising a tread portion and downwardlycorrugated flanged portions, the outermost portions of the corrugationslying within a plane substantially at a right angle to said treadportion and the innermost portions of the corrugations being at an acuteangle to the tread portion.

CHARLES SCHENCK.

